Chicago is a major city with over 250,000 people. Aurora, Naperville, Joliet,
and Gary are major cities with 100,000-249,999 people. Waukegan, Elgin, and
Cicero are major cities with less than 100,000 people.

O'Hare is the International Airport.

Chicago is a major seaport.

The interstates within this region are I-55, I-57, I-65, I-80, I-88, I-90,
I-94, I-294, and I-355.

Figure 2. Number of
fentanyl-related deaths in Cook County, August 2005-December 2006.

Line chart showing the number of fentanyl-related deaths in Cook County,
August 2005-December 2006.

In 2005, the number of fentanyl-related deaths was 0 in August, 3 in September,
2 in October, 4 in November, and 12 in December.

In 2006, the number of fentanyl-related deaths was 10 in January, 9 in February,
12 in March, 25 in April, 47 in May, 47 in June, 39 in July, 28 in August, 32
in September, 38 in October, 21 in November, and 10 in December.